releases/5.4.278/drm-amdgpu-add-error-handle-to-avoid-out-of-bounds.patch

From 8b2faf1a4f3b6c748c0da36cda865a226534d520 Mon Sep 17 00:00:00 2001
From: Bob Zhou <bob.zhou@amd.com>
Date: Tue, 23 Apr 2024 16:58:11 +0800
Subject: drm/amdgpu: add error handle to avoid out-of-bounds
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From: Bob Zhou <bob.zhou@amd.com>

commit 8b2faf1a4f3b6c748c0da36cda865a226534d520 upstream.

if the sdma_v4_0_irq_id_to_seq return -EINVAL, the process should
be stop to avoid out-of-bounds read, so directly return -EINVAL.

Signed-off-by: Bob Zhou <bob.zhou@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -2007,6 +2007,9 @@ static int sdma_v4_0_process_trap_irq(st
 
 	DRM_DEBUG("IH: SDMA trap\n");
 	instance = sdma_v4_0_irq_id_to_seq(entry->client_id);
+	if (instance < 0)
+		return instance;
+
 	switch (entry->ring_id) {
 	case 0:
 		amdgpu_fence_process(&adev->sdma.instance[instance].ring);